class Bundler::Dsl

def group(*args, &blk)
  opts = Hash === args.last ? args.pop.dup : {}
  normalize_group_options(opts, args)
  @groups.concat args
  if opts["optional"]
    optional_groups = args - @optional_groups
    @optional_groups.concat optional_groups
  end
  yield
ensure
  args.each { @groups.pop }
end